CN111478415A - Charging device, method and system - Google Patents
Charging device, method and system Download PDFInfo
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- CN111478415A CN111478415A CN202010297101.5A CN202010297101A CN111478415A CN 111478415 A CN111478415 A CN 111478415A CN 202010297101 A CN202010297101 A CN 202010297101A CN 111478415 A CN111478415 A CN 111478415A
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- generator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
- H02J7/1469—Regulation of the charging current or voltage otherwise than by variation of field
- H02J7/1492—Regulation of the charging current or voltage otherwise than by variation of field by means of controlling devices between the generator output and the battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The embodiment of the invention provides a charging device, a charging method and a charging system, and relates to the technical field of battery charging. The charging device comprises a power conversion module and a controller, wherein the controller is respectively electrically connected with the power conversion module, an engine and a generator; the controller is used for controlling the power conversion module to convert the first direct current provided by the battery into first alternating current so as to enable the generator to rotate; the controller is also used for controlling the engine to drive the generator when the rotating speed of the generator reaches a preset value, so that the generator provides second alternating current for the power conversion module; the controller is also used for controlling the power conversion module to convert the second alternating current into second direct current so as to charge the battery. The starting of the generator can be realized without adding an additional storage battery, and the generator has the advantages of small volume and low cost.
Description
Technical Field
The invention relates to the technical field of battery charging, in particular to a charging device, a charging method and a charging system.
Background
The electronic equipment used outdoors is inconvenient to use due to commercial power, and a generator mode is generally adopted to charge a battery of the electronic equipment.
The starting mode of the generator can adopt a hand-pulling type starting mode and an electric starting mode. Wherein, the hand-pulling type starting has the defect of inconvenient starting. Although the electric starting is convenient to start, an additional storage battery is required to be added for an energy source of the electric starting, so that the weight and the cost are increased, and the storage battery needs to be maintained.
Disclosure of Invention
In view of the above, the present invention provides a charging device, a method and a system, which can start a generator without adding an additional battery, and have the advantages of small size and low cost.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:
in a first aspect, an embodiment provides a charging device, including a power conversion module and a controller, where the controller is electrically connected to the power conversion module, an engine, and a generator, respectively, where the engine is connected to the generator, and the generator is used to be electrically connected to a battery through the power conversion module;
the controller is used for controlling the power conversion module to convert a first direct current provided by the battery into a first alternating current, and the power conversion module is used for transmitting the first alternating current to the generator so as to rotate the generator;
the controller is further used for controlling the engine to drive the generator when the rotating speed of the generator reaches a preset value, so that the generator provides second alternating current power for the power conversion module;
the controller is further configured to control the power conversion module to convert the second alternating current into a second direct current, and the power conversion module is configured to transmit the second direct current to the battery to charge the battery.
In a second aspect, an embodiment provides a charging method applied to a controller of a charging device, the charging device further including a power conversion module electrically connected to the controller, the controller being electrically connected to an engine, the engine being connected to a generator, the generator being electrically connected to a battery through the power conversion module, the method including:
controlling the power conversion module to convert a first direct current provided by the battery into a first alternating current, the power conversion module transmitting the first alternating current to the generator to rotate the generator;
when the rotating speed of the generator reaches a preset value, controlling the engine to drive the generator so that the generator provides second alternating current power for the power conversion module;
and controlling the power conversion module to convert the second alternating current into a second direct current, and transmitting the second direct current to the battery by the power conversion module so as to charge the battery.
In a third aspect, an embodiment provides a charging system, which includes an engine, a generator, and the charging device of the first aspect.
According to the charging device, the charging method and the charging system provided by the embodiment of the invention, the controller controls the power conversion module to convert the first direct current provided by the battery into the first alternating current, and the power conversion module transmits the first alternating current to the generator so as to enable the generator to rotate. The controller is further used for controlling the engine to drive the generator when the rotating speed of the generator reaches a preset value, so that the generator provides second alternating current for the power conversion module. The controller is further configured to control the power conversion module to convert the second alternating current into a second direct current, and the power conversion module is configured to transmit the second direct current to the battery to charge the battery. Therefore, the battery is used as an electric energy source for starting the generator, and an additional storage battery is not required to be configured, so that the charging device has the advantages of small size and low cost. Meanwhile, the power conversion module can realize the conversion from the first direct current to the first alternating current and also can realize the conversion from the second alternating current to the second direct current. The power conversion module can not only realize that the battery provides electric energy for the starting of the generator, but also realize that the generator provides electric energy for the charging of the battery. Therefore, the power conversion module is multiplexed, so that the charging device is simple in structure.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram illustrating a charging system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a charging device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another charging system provided in the embodiment of the present invention;
fig. 4 is a schematic structural diagram of another charging device provided in the embodiment of the present invention;
fig. 5 is a schematic structural diagram of another charging device provided in an embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a charging device according to an embodiment of the present invention;
fig. 7 is a schematic flowchart illustrating a charging method according to an embodiment of the present invention.
The icon comprises 100-a charging system, 110-a charging device, 111-a power conversion module, 1111-a switch unit, 1112-an inductance compensation unit, 112-a controller, 113-a start-stop module, 1131-a start button, 1132-a stop button, 120-an engine, 121-an accelerator, 122-an air door, 123-an enabling ignition device, 130-a generator, 131-a signal acquisition device, 200-electronic equipment, 210-a battery, Q1-a first switch tube, Q2-a second switch tube, Q3-a third switch tube, Q4-a fourth switch tube, Q5-a fifth switch tube, Q6-a sixth switch tube, R1-a first resistor, R2-a second resistor, R3-a third resistor, L1-a first inductor, L2-a second inductor, L3-a third inductor and C1-a capacitor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The charging system provided by each of the following embodiments of the present application can supply power to any type of electronic device used outdoors, for example, the charging system can supply power to an unmanned aerial vehicle, an unmanned ship, an electric vehicle, and the like.
The following description takes the electronic device as an unmanned aerial vehicle as an example. Fig. 1 is a schematic structural diagram of a charging system 100 according to the present embodiment. The charging system 100 includes a charging device 110, a generator 120 and a generator 130, wherein the generator 130 is electrically connected to a battery 210 via the charging device 110, and the generator 130 is electrically connected to the charging device 110 and the generator 120.
In the present embodiment, the battery 210 is a battery in the electronic apparatus 200. The battery 210 may be a detachable battery, that is, the battery 210 may be detached from the electronic device 200, and the battery 210 may be plugged into the charging system 100 to electrically connect with the charging device 110. The battery 210 may also be a non-detachable battery, i.e. the battery 210 may be integrated with the electronic device 200, and the battery 210 may be electrically connected to the charging device 110 through a power line.
The battery 210 may be a lithium battery, a secondary battery, or the like, and in the present embodiment, the battery 210 is exemplified as a lithium battery. The engine 120 may be a diesel engine. The generator 130 may be an alternator, and may be a magneto (PGM). The engine 120 may be coupled to the generator 130 via a shaft.
When the electronic device 200 is performing a job, i.e. the electronic device 200 is not in a charging state, the battery 210 is not connected to the charging device 110. Therefore, when the battery 210 in the electronic device 200 is low in power, the battery 210 can be electrically connected to the charging device 110 by plugging, or the battery 210 can be electrically connected to the charging device 110 by a power cord.
When the battery 210 is electrically connected to the charging device 110, the charging device 110 is configured to convert the first direct current provided by the battery 210 into a first alternating current, and transmit the first alternating current to the generator 130, so as to rotate the generator 130. When the rotation speed of the generator 130 reaches the preset value, the charging device 110 is further configured to control the engine 120 to drive the generator 130, so that the generator 130 provides the second alternating current to the charging device 110. The charging device 110 is also configured to convert the second alternating current into a second direct current and transmit the second direct current to the battery 210, so as to charge the battery 210.
It can be seen that the first direct current remaining in the battery 210 is used as a source of the first alternating current started by the generator 130, and the generator 130 can be started to charge the battery 210 without configuring an additional storage battery, so the charging system 100 has the advantages of small size and low cost.
Fig. 2 is a schematic structural diagram of the charging device 110 shown in fig. 1. The charging device 110 includes a power conversion module 111 and a controller 112, the controller 112 is electrically connected to the power conversion module 111, the engine 120 and the generator 130, respectively, and the generator 130 is electrically connected to the battery 210 through the power conversion module 111.
When the battery 210 is electrically connected to the power conversion module 111, the controller 112 is configured to control the power conversion module 111 to convert a first direct current provided by the battery 210 into a first alternating current, and the power conversion module 111 is configured to transmit the first alternating current to the generator 130 to rotate the generator 130; the controller 112 is further configured to control the engine 120 to drive the generator 130 when the rotation speed of the generator 130 reaches a preset value, so that the generator 130 provides the second alternating current power to the power conversion module 111; the controller 112 is further configured to control the power conversion module 111 to convert the second alternating current into the second direct current, and the power conversion module 111 is configured to transmit the second direct current to the battery 210 to charge the battery 210.
Wherein the preset value is data preset in the controller 112. After the generator 130 rotates, the generator 130 is configured to transmit the rotation speed thereof to the controller 112, the controller 112 is configured to match the rotation speed of the generator 130 with a preset value, and if the rotation speed of the generator 130 reaches the preset value, the controller 112 controls the engine 120 to drive the generator 130.
Fig. 3 is a schematic structural diagram of another embodiment of the charging system 100 according to the present invention. The generator 130 may include a signal acquisition device 131, and the signal acquisition device 131 is electrically connected to the controller 112. The signal acquisition device 131 is used for acquiring the rotation speed of the generator 130 and transmitting the rotation speed of the generator 130 to the controller 112. The signal collecting device 131 may employ a hall sensor.
As shown in fig. 3, the engine 120 includes a throttle 121, a throttle 122, and an enabling ignition device 123, and the throttle 121, the throttle 122, and the enabling ignition device 123 are all electrically connected to the controller 112. The controller 112 controls the accelerator 121, the damper 122 and the enabling ignition device 123 to be opened when the rotation speed of the generator 130 reaches a preset value, and simultaneously the controller 112 also controls the power conversion module 111 to stop converting the first direct current into the first alternating current, so that the engine 120 ignites the mixed gas, converts chemical energy into mechanical energy, and further drives the generator 130 to rotate and operate, so that the generator 130 generates the second alternating current.
In this embodiment, before the controller 112 controls the power conversion module 111 to convert the second ac power into the second dc power, the controller 112 matches the rotation speed of the generator 130 with a preset range value, and if the rotation speed of the generator 130 is within the preset range value, the controller 112 controls the power conversion module 111 to convert the second ac power into the second dc power. It is understood that the signal acquisition device 131 acquires the rotation speed of the generator 130 in real time and transmits the rotation speed of the generator 130 to the controller 112 in real time. The controller 112 matches the rotation speed of the generator 130 with the preset range value in order to ensure that the generator 130 is successfully started, that is, if the rotation speed of the generator 130 is within the preset range value under the driving of the engine 120 by the generator 130, it indicates that the generator 130 is successfully started; if the rotation speed of the generator 130 is not within the preset range, it indicates that the generator 130 fails to start. And the rotating speed value within the preset range value is larger than the rotating speed value corresponding to the preset value.
In this embodiment, the controller 112 is also electrically connected to the battery 210. After the generator 130 is successfully started, the controller 112 may further detect a state of the battery 210, and determine whether the battery 210 is chargeable according to the state of the battery 210, and if so, the controller 112 may be configured to control the power conversion module 111 to convert the second ac power into the second dc power according to a constant current and constant voltage algorithm. If charging is not possible, the controller 112 may generate an alert prompt.
It will be appreciated that the second direct current comprises an operating current and an operating voltage. The controller 112 controls the power conversion module 111 to convert the second ac power into the corresponding second dc power according to the preset magnitude of the working current and the working voltage.
In other words, the charging process of the battery 210 is divided into two phases, the first phase may be a constant current charging phase: the controller 112 controls the working current included in the second direct current converted by the power conversion module 111 to be the set working current according to the set working current, and the working voltage included in the second direct current is correspondingly increased. And switching to the second stage until the working voltage included in the second direct current rises to the set working voltage. The second phase may be a constant voltage charging phase: the controller 112 controls the operating voltage included in the operating voltage converted by the power conversion module 111 to be maintained at the set operating voltage according to the set operating voltage, so that the operating current included in the second direct current gradually decreases.
In this embodiment, the controller 112 is further configured to control the power conversion module 111 to stop converting the second alternating current into the second direct current to stop charging the battery 210 when the current value corresponding to the working current is smaller than the preset current value. It can be understood that, in the constant voltage charging phase, when the current value corresponding to the operating current gradually decreases and is lower than the preset current value, indicating that the battery 210 is in a fully charged state, the controller 112 controls the power conversion module 111 to stop the electrical signal conversion, so as to close the charging loop of the battery 210.
In order to save energy consumption of the charging system 100, the controller 112 sends a shutdown command to the generator 130 during a preset time period when the power conversion module 111 is controlled to stop performing the electrical signal conversion, and no new battery 210 to be charged is electrically connected to the power conversion module 111, so that the generator 130 stops operating according to the shutdown command. It can be understood that the controller 112 is in the standby state during the preset time when the power conversion module 111 is controlled to stop performing the electrical signal conversion, and if a new battery 210 to be charged is electrically connected to the power conversion module 111 during the preset time, the generator 130 outputs the second alternating current to the power conversion module 111 again, so as to charge the new battery 210 to be charged. If no new battery 210 needing to be charged is electrically connected with the power conversion module 111 within the preset time, the controller 112 controls the generator 130 to stop, so as to save energy consumption.
In this embodiment, the controller 112 may adopt a voltage loop and current loop closed-loop control strategy in the process of controlling the power conversion module 111 to convert the second alternating current into the second direct current according to the constant-current constant-voltage algorithm.
During the charging process of the battery 210, the controller 112 is further configured to control the opening degree of the throttle 121 to increase the rotation speed of the generator 130 when the output power represented by the second ac power output by the generator 130 increases. The controller 112 is further configured to control the opening degree of the throttle valve 121 to decrease to adjust the rotation speed of the generator 130 when the output power represented by the second ac power output by the generator 130 decreases.
The opening degree of the accelerator 121 is adjusted according to the output power of the generator 130, so that the mechanical energy generated by the generator 130 driven by the engine 120 to rotate can be adjusted, the voltage difference between the induced voltage of the generator 130 and the voltage of the battery 210 can be reduced, the current flowing through the power conversion module 111 can be correspondingly reduced, and the loss of the charging device 110 can be reduced.
Referring to fig. 4, which is a schematic structural diagram of another practical implementation of the charging device 110 according to the embodiment of the present invention, the charging device 110 shown in fig. 4 further includes a start-stop module 113 on the basis of the charging device 110 shown in fig. 2, and the start-stop module 113 is electrically connected to the controller 112.
The start-stop module 113 is configured to generate a start signal in response to a start operation of a user, and transmit the start signal to the controller 112; the controller 112 is configured to control the power conversion module 111 to convert the first direct current into the first alternating current according to the start signal when the battery 210 is electrically connected to the power conversion module 111.
In this embodiment, the start-stop module 113 includes a start key 1131, the start key 1131 is electrically connected to the controller 112, and the start key 1131 is used for generating a start signal in response to a pressing operation of a user. It can be understood that when the battery 210 is electrically connected to the power conversion module 111, the battery 210 does not need to be charged immediately, but the controller 112 controls the power conversion module 111 to perform the electrical signal conversion operation after the activation key 1131 generates the activation signal in response to the pressing operation of the user, so as to charge the battery 210. That is, when the battery 210 starts to be charged after the battery 210 is electrically connected to the power conversion module 111, the operator determines that the operator presses the start button 1131 when the operator considers that the battery 210 can be charged.
Further, in this embodiment, the start-stop module 113 further includes a stop button 1132, and the stop button 1132 is electrically connected to the controller 112. The stop button 1132 is configured to generate a stop signal in response to a pressing operation of a user, and transmit the stop signal to the controller 112, and the controller 112 is configured to control the power conversion module 111 to stop performing electrical signal conversion according to the stop signal.
It is understood that the controller 112 actively controls the power conversion module 111 to stop the electrical signal conversion to close the charging loop of the battery 210 except when the battery 210 is fully charged. When the battery 210 is not fully charged, a stop button 1132 generates a stop signal in response to a pressing operation of the user, so that the controller 112 controls the power conversion module 111 to stop the conversion of the electric signal according to the stop signal, so as to stop charging the battery 210. That is, in the case that the battery 210 is not fully charged, the worker may terminate the charging of the battery 210 in advance through the stop button 1132 for a time reason.
In this embodiment, the start key 1131 and the stop key 1132 may be mechanical keys or touch keys.
Fig. 5 is a schematic structural diagram of a charging device 110 according to another embodiment of the present invention. The power conversion module includes a switch unit 1111, the switch unit 1111 is electrically connected to the controller 112, and the generator 130 is electrically connected to the battery 210 through the switch unit 1111.
The switching unit 1111 is configured to convert the first direct current into a first alternating current under the control of the controller 112; the switching unit 1111 is further configured to convert the second alternating current into the second direct current under the control of the controller 112.
It is understood that the controller 112 is configured to convert the first direct current into the first alternating current and convert the second alternating current into the second direct current by controlling the on-time and the off-time of the switching unit 1111.
The switching unit 1111 is configured to boost and rectify the second ac power under the control of the controller 112 to obtain a second dc power. That is, the switching unit 1111 may adopt a BOOST topology similar to the BOOST topology to convert the second ac power provided by the generator 130 into the second dc power through the controllable current-voltage loop, so as to charge the battery 210. Because the switch unit 1111 adopts a non-isolated boost structure, the withstand voltage of devices such as power resistor-capacitor and the like can be selected to be a low withstand voltage value, so that the charging device 110 has a simple structure and a smaller volume.
Further, as shown in fig. 5, the power conversion module 111 further includes an inductance compensation unit 1112, and the generator 130 is electrically connected to the switching unit 1111 through the inductance compensation unit 1112. The inductance compensation unit 1112 is used for compensating the inductance of the generator 130 and/or the inductance of the battery 210. It is understood that the inductance compensation unit 1112 is configured to function as an electrical energy storage to compensate for the inductance of the generator 130 and/or the inductance of the battery 210. The inductance compensation unit 1112 may be determined according to the inductance of the generator 130 and the inductance of the battery 210. Of course, the power conversion module 111 may also determine whether the inductance compensation unit 1112 needs to be included according to the inductance of the generator 130 and the inductance of the battery 210, that is, the inductance compensation unit 1112 may be eliminated.
Fig. 6 is a schematic circuit diagram of a charging device 110 according to an embodiment of the present invention. The switch unit 1111 includes a first switch tube Q1, a second switch tube Q2, a third switch tube Q3, a fourth switch tube Q4, a fifth switch tube Q5 and a sixth switch tube Q6, a first pin of the first switch tube Q1, a first pin of the second switch tube Q2, a first pin of the third switch tube Q3, a first pin of the fourth switch tube Q4, a first pin of the fifth switch tube Q5 and a first pin of the sixth switch tube Q6 are all electrically connected with the controller 112, a second pin of the first switch tube Q1, a second pin of the third switch tube Q3 and a second pin of the fifth switch tube Q5 are all electrically connected with the positive electrode of the battery 210, a second pin of the second switch tube Q2 is electrically connected with a third pin of the first switch tube Q1, a second pin of the fourth switch tube Q4 is electrically connected with a third pin of the third switch tube Q3, a sixth pin of the third switch tube Q5 8 is electrically connected with a third pin of the third switch tube Q6, a first phase port of the generator 130 is electrically connected between the third pin of the first switch tube Q1 and the second pin of the second switch tube Q2, a second phase port of the generator 130 is electrically connected between the third pin of the third switch tube Q3 and the second pin of the fourth switch tube Q4, a third phase port of the generator 130 is electrically connected between the third pin of the fifth switch tube Q5 and the second pin of the sixth switch tube Q6, and the third pin of the second switch tube Q2, the third pin of the fourth switch tube Q4 and the third pin of the sixth switch tube Q6 are all electrically connected with the negative electrode of the battery 210.
It can be understood that the controller 112 may generate six control signals to the first pin of the first switch tube Q1, the first pin of the second switch tube Q2, the first pin of the third switch tube Q3, the first pin of the fourth switch tube Q4, the first pin of the fifth switch tube Q5 and the first pin of the sixth switch tube Q6, so as to control the on-time and the off-time of the first switch tube Q1, the second switch tube Q2, the third switch tube Q3, the fourth switch tube Q4, the fifth switch tube Q5 and the sixth switch tube Q6, respectively, thereby converting the first direct current into the first alternating current and converting the second alternating current into the second direct current.
The first switching tube Q1, the second switching tube Q2, the third switching tube Q3, the fourth switching tube Q4, the fifth switching tube Q5 and the sixth switching tube Q6 can be further understood as three-phase six-way switching tubes, the first switching tube Q1, the second switching tube Q2, the third switching tube Q3, the fourth switching tube Q4, the fifth switching tube Q5 and the sixth switching tube Q6 can be MOS tubes (metal oxide semiconductor field effect transistors), the first pin of the first switching tube Q1, the second switching tube Q2, the third switching tube Q3, the fourth switching tube Q4, the fifth switching tube Q5 and the sixth switching tube Q6 can be understood as the gate of the MOS tube, the first pin of the first switching tube Q1, the second switching tube Q2, the second switching tube Q867, the fourth switching tube Q2, the sixth switching tube Q87472 and the sixth switching tube Q4 can be understood as the drain of the third switching tube Q4, the fourth switching tube Q4 and the fifth switching tube Q4 can be understood as the drain of the MOS tubes, The third pins of the third switch tube Q3, the fourth switch tube Q4, the fifth switch tube Q5 and the sixth switch tube Q6 can be understood as the sources of MOS transistors. The switching frequency of the first switching tube Q1, the second switching tube Q2, the third switching tube Q3, the fourth switching tube Q4, the fifth switching tube Q5 and the sixth switching tube Q6 can be set to 60K. A first phase port of the generator 130 may be set to an a-phase, a second phase port of the generator 130 may be set to a B-phase, and a third phase port of the generator 130 may be set to a C-phase.
Further, in this embodiment, the switch unit 1111 further includes a first resistor R1, a second resistor R2 and a third resistor R3, the third pin of the second switch Q2 is electrically connected to the negative electrode of the battery 210 through the first resistor R1, the third pin of the fourth switch Q4 is electrically connected to the negative electrode of the battery 210 through the second resistor R2, and the third pin of the sixth switch Q6 is electrically connected to the negative electrode of the battery 210 through the third resistor R3.
Further, in this embodiment, the switch unit 1111 further includes a capacitor C1, and the capacitor C1 is connected in parallel between the second pin of the first switch tube Q1, the second pin of the third switch tube Q3, the second pin of the fifth switch tube Q5, the third pin of the second switch tube Q2, the third pin of the fourth switch tube Q4, and the third pin of the sixth switch tube Q6. The capacitor C1 is used for rectifying and filtering.
As shown in fig. 6, the inductance compensation unit 1112 includes a first inductor L1, a second inductor L2, and a third inductor L3, a first phase port of the generator 130 is electrically connected to the switching unit 1111 through the first inductor L1, a second phase port of the generator 130 is electrically connected to the switching unit 1111 through the second inductor L2, and a third phase port of the generator 130 is electrically connected to the switching unit 1111 through the third inductor L3.
It is understood that the first phase port of the generator 130 is electrically connected between the third pin of the first switch tube Q1 and the second pin of the second switch tube Q2 through the first inductor L1, the second phase port of the generator 130 is electrically connected between the third pin of the third switch tube Q3 and the second pin of the fourth switch tube Q4 through the second inductor L2, and the third phase port of the generator 130 is electrically connected between the third pin of the fifth switch tube Q5 and the second pin of the sixth switch tube Q6 through the third inductor L3.
Fig. 7 is a schematic flow chart of a charging method according to an embodiment of the present invention. It should be noted that, the charging method provided in the embodiment of the present invention is not limited by fig. 7 and the following specific sequence, and it should be understood that, in other embodiments, the sequence of some steps in the charging method provided in the embodiment of the present invention may be interchanged according to actual needs, or some steps in the charging method may be omitted or deleted. The charging method can be applied to the controller 112 shown in fig. 2-6, and the specific process shown in fig. 7 will be described in detail below.
Step S301, the power conversion module is controlled to convert the first direct current provided by the battery into a first alternating current, and the power conversion module transmits the first alternating current to the generator to rotate the generator.
It is understood that when the battery 210 and the power conversion module 111 are electrically connected, the power conversion module 111 is used for converting the first direct current provided by the battery 210 into the first alternating current and transmitting the first alternating current to the generator 130 to rotate the generator 130.
And step S302, when the rotating speed of the generator reaches a preset value, controlling the engine to drive the generator so that the generator provides second alternating current for the power conversion module.
It is understood that the preset value is data preset in the controller 112. After the generator 130 rotates, the generator 130 is configured to transmit the rotation speed thereof to the controller 112, the controller 112 is configured to match the rotation speed of the generator 130 with a preset value, and if the rotation speed of the generator 130 reaches the preset value, the controller 112 controls the engine 120 to drive the generator 130.
The controller 112 controls the accelerator 121, the damper 122 and the enabling ignition device 123 to be opened when the rotation speed of the generator 130 reaches a preset value, and simultaneously the controller 112 also controls the power conversion module 111 to stop converting the first direct current into the first alternating current, so that the engine 120 ignites the mixed gas, converts chemical energy into mechanical energy, and further drives the generator 130 to rotate and operate, so that the generator 130 generates the second alternating current.
Step S303, the power conversion module is controlled to convert the second ac power into a second dc power, and the power conversion module transmits the second dc power to the battery, so as to charge the battery.
It will be appreciated that the second direct current comprises an operating current and an operating voltage. The controller 112 controls the power conversion module 111 to convert the second ac power into the corresponding second dc power according to the preset magnitude of the working current and the working voltage.
In summary, in the charging device, the method, and the system provided in this embodiment, the controller controls the power conversion module to convert the first direct current provided by the battery into the first alternating current, and the power conversion module transmits the first alternating current to the generator, so as to rotate the generator. The controller is further used for controlling the engine to drive the generator when the rotating speed of the generator reaches a preset value, so that the generator provides second alternating current for the power conversion module. The controller is further configured to control the power conversion module to convert the second alternating current into a second direct current, and the power conversion module is configured to transmit the second direct current to the battery to charge the battery. Therefore, the battery is used as an electric energy source for starting the generator, and an additional storage battery is not required to be configured, so that the charging device has the advantages of small size and low cost. Meanwhile, the power conversion module can realize the conversion from the first direct current to the first alternating current and also can realize the conversion from the second alternating current to the second direct current. The power conversion module can not only realize that the battery provides electric energy for the starting of the generator, but also realize that the generator provides electric energy for the charging of the battery. Therefore, the power conversion module is multiplexed, so that the charging device is simple in structure.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (14)
1. A charging device is characterized by comprising a power conversion module and a controller, wherein the controller is respectively electrically connected with the power conversion module, an engine and a generator, the engine is connected with the generator, and the generator is used for being electrically connected with a battery through the power conversion module;
the controller is used for controlling the power conversion module to convert a first direct current provided by the battery into a first alternating current, and the power conversion module is used for transmitting the first alternating current to the generator so as to rotate the generator;
the controller is further used for controlling the engine to drive the generator when the rotating speed of the generator reaches a preset value, so that the generator provides second alternating current power for the power conversion module;
the controller is further configured to control the power conversion module to convert the second alternating current into a second direct current, and the power conversion module is configured to transmit the second direct current to the battery to charge the battery.
2. The charging device of claim 1, wherein the controller is configured to control the power conversion module to convert the second ac power into the second dc power according to a constant current and constant voltage algorithm.
3. The charging device of claim 1, wherein the engine includes a throttle electrically connected to the controller;
the controller is used for controlling the opening degree of the accelerator to be increased when the output power represented by the second alternating current output by the generator is increased so as to increase the rotating speed of the generator.
4. The charging device of claim 1, wherein the engine includes a throttle electrically connected to the controller;
the controller is used for controlling the opening degree of the accelerator to be reduced when the output power represented by the second alternating current output by the generator is reduced so as to reduce the rotating speed of the generator.
5. The charging device of claim 1, wherein the second direct current comprises an operating current, and the controller is further configured to control the power conversion module to stop converting the second alternating current into the second direct current to stop charging the battery when a current value corresponding to the operating current is smaller than a preset current value.
6. The charging device of claim 1, wherein the power conversion module comprises a switch unit electrically connected to the controller, and the generator is electrically connected to the battery through the switch unit;
the switch unit is used for converting the first direct current into a first alternating current under the control of the controller;
the switching unit is further configured to convert the second alternating current into the second direct current under the control of the controller.
7. The charging device according to claim 6, wherein the switching unit is configured to boost and rectify the second alternating current to obtain the second direct current under the control of the controller.
8. The charging device according to claim 6, wherein the switch unit comprises a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube and a sixth switch tube, the first pin of the first switch tube, the first pin of the second switch tube, the first pin of the third switch tube, the first pin of the fourth switch tube, the first pin of the fifth switch tube and the first pin of the sixth switch tube are all electrically connected with the controller, the second pin of the first switch tube, the second pin of the third switch tube and the second pin of the fifth switch tube are all electrically connected with the positive electrode of the battery, the second pin of the second switch tube is electrically connected with the third pin of the first switch tube, the second pin of the fourth switch tube is electrically connected with the third pin of the third switch tube, the second pin of the sixth switch tube is electrically connected with the third pin of the fifth switch tube, a first phase port of the generator is electrically connected between a third pin of the first switch tube and a second pin of the second switch tube, a second phase port of the generator is electrically connected between a third pin of the third switch tube and a second pin of the fourth switch tube, a third phase port of the generator is electrically connected between a third pin of the fifth switch tube and a second pin of the sixth switch tube, and the third pin of the second switch tube, the third pin of the fourth switch tube and the third pin of the sixth switch tube are all electrically connected with the negative electrode of the battery.
9. The charging device according to claim 8, wherein the switching unit further comprises a first resistor, a second resistor, and a third resistor, the third pin of the second switching tube is electrically connected to the negative electrode of the battery through the first resistor, the third pin of the fourth switching tube is electrically connected to the negative electrode of the battery through the second resistor, and the third pin of the sixth switching tube is electrically connected to the negative electrode of the battery through the third resistor.
10. The charging device of claim 6, wherein the power conversion module further comprises an inductance compensation unit, and the generator is electrically connected with the switch unit through the inductance compensation unit;
the inductance compensation unit is used for compensating the inductance of the generator and/or the inductance of the battery.
11. The charging device according to claim 10, wherein the inductance compensation unit includes a first inductance, a second inductance, and a third inductance, the first phase port of the generator is electrically connected to the switching unit through the first inductance, the second phase port of the generator is electrically connected to the switching unit through the second inductance, and the third phase port of the generator is electrically connected to the switching unit through the third inductance.
12. The charging device of claim 1, further comprising a start-stop module electrically connected to the controller;
the starting and stopping module is used for responding to starting operation of a user to generate a starting signal and transmitting the starting signal to the controller;
the controller is used for controlling the power conversion module to convert the first direct current into the first alternating current according to the starting signal when the battery is electrically connected with the power conversion module.
13. A charging method applied to a controller of a charging device, the charging device further comprising a power conversion module electrically connected to the controller, the controller being electrically connected to an engine, the engine being connected to a generator, the generator being configured to be electrically connected to a battery through the power conversion module, the method comprising:
controlling the power conversion module to convert a first direct current provided by the battery into a first alternating current, the power conversion module transmitting the first alternating current to the generator to rotate the generator;
when the rotating speed of the generator reaches a preset value, controlling the engine to drive the generator so that the generator provides second alternating current power for the power conversion module;
and controlling the power conversion module to convert the second alternating current into a second direct current, and transmitting the second direct current to the battery by the power conversion module so as to charge the battery.
14. An electrical charging system comprising an engine, a generator and a charging apparatus as claimed in any one of claims 1 to 12.
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